California lawmakers voted Friday to bar middle and high schools from starting before 8：30 a.m. to help give students more sleep.
The bill, SB328, narrowly passed in both chambers. If Gov. Jerry Brown signs the bill, schools will have about three years to comply. It would not apply to rural schools and mandate changes to school day lengths.
Supporters suggest that later start times make kids healthier by letting them get more sleep. However, opponents say local school boards, not the state, should determine start times.
Nearly 80 percent of California middle and high schools started earlier than 8：30 a.m. in 2012. According to the National Sleep Foundation, students, especially teens, aren’t getting enough sleep. The average teenager needs between eight and 10 hours of sleep.
chamber：名詞，議院，議會。例句：There are two chambers in the British parliament.（英國國會有兩個議院。）
comply：動詞，遵守，順從，履行。例句：He was jailed for refusing to comply with the court order.（他因拒絕遵守法院命令而入獄。）
mandate：動詞，要求，命令。例句：The government should have mandated that these figures be made public.（政府應該下令將這些數據公諸於世。）